I played the original demo and was a bit underwhelmed by the combat. It was way too easy, but more importantly, the trash mobs felt almost completely passive when you were fighting groups. They would just stand around waiting for their turn instead of putting any real pressure on you.
I'm a huge Sekiro fan and played it to NG+4, so I probably had pretty high expectations going in. The game looks great though, and I haven't played the extended demo yet, so I'm curious if they made any improvements.